Sylvania, AL 35988 Frost Dates
35988, near Sylvania, AL: the frost window
The last spring frost here typically falls around 03/29, about 213 days from today. Fall's first freeze usually shows up around 11/08, roughly 225 days after the last spring frost.
Zone 7b (5 to 10°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Sylvania, not a forecast for this year.
Stretching the season past the first frost
Sylvania's growing season runs out in roughly 10 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 03/29 isn't a guarantee
03/29 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/07 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/16 and only about 1 year in 10 sees frost after that.
Sylvania against the rest of the dataset
At roughly 225 frost-free days, Sylvania places 11,436 of 40,283 ZIP codes in this dataset. Within AL, it ranks 594 of 809.
Learn more
Two guides worth reading on 35988: zone vs. frost date, on why Zone 7b and Sylvania's frost date answer different questions, and the frost range, on how to read the range around Sylvania's dates instead of trusting one.